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AT&T Office@Hand Enterprise Dial Plan – Max Extension Length, Outbound Call Prefix, & Site Codes
Max Extension Length
Article #11732

Max Extension Length
Outbound Call Prefix
Site Codes

Max Extension Length

This section outlines the experience when enabling Max Extension Length for Enterprise Dial Plans.

Enterprise Dial Plan – Max Extension Length

Key features and benefits:

  • Increases maximum extension length from 6 to 8 digits.
  • Optional Outbound Call Prefix when using 7 to 8 digit extensions to help users indicate when they are dialing external vs internal numbers.
  • Some accounts may have to enable and configure Outbound Call Prefix to reduce conflict between Internal extensions and local external numbers.

Availability:

  • Available to all AT&T Office@Hand Office accounts
  • Ideal for accounts with 1000+ users    
  • Contact Support to enable for your account.   

Requirements:

  • To help reduce conflicts, the Default Area Code (DAC) feature is disabled. To reach external destinations, users must dial full external numbers e.g. 6507774444 or 16507774444)
  • If there is an overlap between internal numbers and external numbers, you need to enable Outbound Call Prefix.
  • Support will have to enable Outbound Call Prefix for your account. Once enabled, you can configure it on the Admin Portal. Default Area Code will be enabled for this configuration.      

IMPORTANT:  When selecting the outbound call prefix digit, determine if the desired digit overlaps with special, reserved numbers based on your location(s). For example, in Poland the Fire Brigade number is 998 and Municipal Police is 986.  If ‘9’ is selected as the outbound call prefix digit, it will create an overlap between dialing the Fire Brigade without the prefix (998) and the Municipal Police with the prefix (9,98).  Other countries such as Singapore, Malaysia, and Costa Rica have similar special numbers.

Outbound Call Prefix

This section provides the guidelines and steps in configuring Outbound Call Prefix.

Enterprise Dial Plan – Outbound Call Prefix

Features and Benefits:

  • An optional feature that helps Users explicitly indicate when dialing an internal extension vs external call.
  • Resolves conflicts with external PSTN numbers
  • Can be any digit between 2­9.
  • During configuration, a wizard will help resolve any conflicts between existing extensions which start with the Outbound Call Prefix.
  • After Outgoing Call Prefix is enabled, Default Area Code feature is also enabled. For example: If Default Area Code is set to 650, and Outgoing Call Prefix is set to 9, then dialing 9, 777 4444 routes to 650 777 4444

OUTBOUND CALL PREFIX LIMITATION WITH LINKED ACCOUNTS (ACCOUNT LINKING ENABLED)

  • Linked Accounts must use the same Maximum Extension Length & Site Code settings.
  • Outbound Call Prefix (OCP) is optional.
  • It is strongly recommended to use the same OCP setting and digit across all Linked accounts.
  • If OCP is enabled for Linked Account 1 (set to 9), but OFF for Linked Account 2, then no extensions in either account can start with the OCP digit (9 in this • case).
  • If OCP is enabled for both Linked Accounts (set to 9 for acct 1, 8 for acct 2), then no extensions in either account can start with either OCP digit (8 and 9 in this case)
  • Duplicated Extension numbers between Linked accounts is not supported.

How to configure Outbound Call Prefix

  1. Contact Support to enable Outbound Call Prefix on your account.
  2. Go to Tools > Outbound Call Prefix.
  3. Enable outgoing call prefix Phones reboot when setting is enabled/updated. Active calls are not affected.
  4. Enter the single digit that users will dial before dialing an external number. Click Validate & Save.
  5. On the Adjust Extensions window, change any extensions that will conflict with the selected prefix digit.
  6. If Site Codes are enabled, You will need to change any Site Codes and/or Short Extensions that start with the selected prefix digit.

IMPORTANT: When selecting the outbound call prefix digit, determine if the desired digit overlaps with special, reserved numbers based on your location(s). For example, in Poland the Fire Brigade number is 998 and Municipal Police is 986. If ‘9’ is selected as the outbound call prefix digit, it will create an overlap between dialing the Fire Brigade without the prefix (998) and the Municipal Police with the prefix (9,98). Other countries such as Singapore, Malaysia, and Costa Rica have similar special numbers.

Site Codes

This section outlines the steps to configure Site Codes for AT&T Office@Hand Enterprise Dial Plan accounts.

Enterprise Dial Plan ­ Site Codes

Who needs site codes?

  • Ideal for Site­-based dial plans (e.g. Distributed Retail)
  • Simplifies Intra­site dialing    
  • Extensions are based on Site (e.g. Site Code + Short Extension = Full Ext.) If Users move, they change their extension
  • Supports fixed length extensions (e.g. 22444, 33555)    
  • Can be used with Multi-site features         

How to configure Site Codes:

  1. Enable Multi­-Site Support.
  2. On the Multi­-Site Settings page, click Enable Site Codes.
  3. Extension Number Length
    Configure the number of digits that will comprise the Site Code Length and the Short Extension Number Length. Click Next to proceed.

    • Max Extension Length:  Based on Admin Web setting
    • Site Code Length:   Can be 1­6 digits    
    • Short Extension Length:   Can be 1­7 digits
  4. Provision Site Codes
    Site Codes are automatically generated.  Site Codes can be customized to any number that follows the Site Code Length. Click Next to proceed.
  5. Adjust Extension Numbers
    New Short Extension Numbers are automatically generated.  Short Extension Numbers can be customized to any number that follows the Short extension Number Length. Click Confirm to accept the New Full Extension Numbers.    
    IMPORTANT: Reserved numbers or short codes cannot be duplicated in the defined site. N11 numbers like 911 cannot be used as a short extension. Click here to view the list of reserved numbers or short codes.
  6. Site Codes confirmation
    All extensions are now updated with the new Site Code extensions. Click Finish to close the window. You will be returned to the Multi­-Site Settings page.      
    Note: Click Edit under the Site Codes Settings to edit the Extension Number Length and Extension Numbers you have configured.